You are testing an unattended gasoline pump that only accepts credit cards. Once the credit card is validated, the pump nozzle placed into the tank, and the desired grade selected, the customer enters the desired amount of fuel in gallons using the keypad. The keypad only allows the entry of digits. Fuel is sold in tenths (0.1) of a gallon, up to 50.0 gallons. Which of the following is a minimum set of desired amounts that covers the equivalence partitions for this input?
選択肢
A.0.0, 20.0, 60.0✓
B.0.0, 0.1, 50.0
C.0.0, 0.1, 50.0, 70.0
D.-0.1, 0.0, 0.1, 49.9, 50.0, 50.1
正解
A: 0.0, 20.0, 60.0

Question

You are testing an unattended gasoline pump that only accepts credit cards. Once the credit card is validated, the pump nozzle placed into the tank, and the desired grade selected, the customer enters the desired amount of fuel in gallons using the keypad. The keypad only allows the entry of digits. Fuel is sold in tenths (0.1) of a gallon, up to 50.0 gallons. Which of the following is a minimum set of desired amounts that covers the equivalence partitions for this input?

選択肢

A.0.0, 20.0, 60.0✓

B.0.0, 0.1, 50.0

C.0.0, 0.1, 50.0, 70.0

D.-0.1, 0.0, 0.1, 49.9, 50.0, 50.1

正解

A: 0.0, 20.0, 60.0

Accepted Answer

0.0, 20.0, 60.0.